Trolley-tender



R. G. AVER'ILL.

TROLLEY TENDER.

APPLICATION FILED AuG.5. IsIa.

1,353,507. l PatenteISeptZL 1920.

pivot center of the dog and the center of Y.

spring stud (ll) as indicated Yby the line i The springl() is preferablv in the form of an ordinary'spiral and when arranged in position exerts no torsional pres-V sure as such but does exert pressure on the Y tending-tov separate the points l1 and 13 in vdog in the direction only away from the pivotal spring Vvstud ll or substantially in the direction toward the pivotal point o1c the dog as noted by the arrowed line C and D, this being due Vto the spring being pivoted 1 at 11 and ,13 and the distance between the pointsv 11 and 13, whenrthefsp'rin'g is-installed, is less-than it normally would be whennot installed, thus exerting a torce thedirection of the arrowed line C and DL Consequently, when the dog BV isV Vin theV solidV line or retracted position shown in Fig. 2, and in which'positionthe end (i3) of Vthe spring vengages. lthe vdog yat a point below the dead center line, a pressure of the -springrwill be exerted upon the dog in the vdirection indicated'by the arrow C, and obviously will' yieldablymaintain the dog in engagement vwith the stop (7). Likewise, when the dog is thrown to its outward position, as shown in dotted lines, thev point at whichv the springengages the dog will move above the dead center line and in this position the spring exerts pressure upon the dog in the` direction indicated by the arrow D, and yieldably vmaintains the 'dog yin itsy outward position. VThus it will be seen that the spring l(10) serves to yieldably maintain the door inV either position. Y Y.

*or the purpose'of resetting the dog 'from its outward position to its inward or re-Y tracted position, I provide a shoulder which will-engage the dog and force it to move inward vand into retracted position when thereel is'v rotated in the rope winding direction or against the pullof the trolandhme'ans to move the dog into tion afterengaging the case. 65

ley rope. Y f Having illustrated one embodiment thereof, I do not fully described my invention and wish to beflimitedYtotlie'details of the construction shown as' these can obviously Y'be changed without departingrfrom the spirit and scope of the'invention.v Iclaimz- 1. In: a trolley'gtender the combination with a case, a' reel'rotatably mountedl therein, a dogA pivotally supported by the reel and normallyout of'rengagementwith the case but movable into operative engagement therewith, of a single operatingV means tol maintain the dog inone position when normally out of engagement with'the case and to maintain the V.dog in another position Vwhen inoperative engagement with the case,

normal posi- 2.`In aftro'lley tender thel .combination with a case, la reel rotatably mounted therein, a spring` urging the reel to rotate in one direction, andY a dog pivotally secured to the reel and normally out of engagement with the case, but movable outward by rapid rotation ot' the reel, and into engagement `with the case to interlock the reel against rotation in the direction as against thelaction of the spring, of means to yiel'dably maintain the dog in its .normal position vout of V -engagement withV the case andY serving also,

to yieldably maintain the dog ini its outward oroperative position when moved into engagement with the case, -and meansto move the dog into normal position after engaging the case. n 1 .f v 3. Ina trolley tender, thefcombination witha case, a reel rotatably mounted therein, and a dog pivotallysupported by the reel and normally held ina' retracted posibut movable outward, byv rapid rotationwof w the reel, and into an Voperative position/.toria stop provided in the case, thereby prevent-v ing rotation of the reel in one direction, of yieldable means engaging the dog and resistingY movement of the latter in onekdirection, when in'one position, and.l resisting movement of the dog, in the opposite direction, when in tli'eother pition, andmeansf for resetting the dog' into normal position.

4. In a trolley tender the .combination with a case, a reel rotatably mounted therein, and a dog carried by the reel and nor- 'inallyy disposed in an inoperative position, 100

Vbut movable outwardly,r by centrifugal n -torce, and into an operativepositionto Vengage a Vstop provided in the caseiand thereby interlock-the reel with the .case against relative rotationy in one direction, ofv resilient means connected to the reel and the dog and resisting movement of 'the latter `from the inoperative to the operative position under a predetermined amount 'of 'centrifugal force, and serving also to yieldingly maintain thel dog in its .operative position when disposed therein, and mean-s to 'cooperate with the dog to restore the vlatter to its inoperative position by rotation oithe reel in a rope-winding direction. i

5. In av device of the character describe-d, a case, a spindle in the 1case,"a reel rotatably mounted on the "spindle/,1a spring urging the `ably maintain the latter in either-inoperative or operative position, and'means to move the 130 85 tion or out of engagement withV the case,

iio

dog into inoperative position from the operative osition.

6. trolley tender comprising in combination a case, a reel rotatably mounted therein to receive a trolley rope, a centrifugal dog pivotally secured( to the reel, said dog being disposed in one position under normal operation of the device and movable to another lposition under the iniuence of centrifugal force upon Vrotation of the reel to exceed a predetermined speed7 yieldable means connected to the reel and dog and operating to urge the dog to rotate in one direction when in one position and in the opposite direction when in the other Y position, and means to move the dog to its normal operating position. l u

7. A trolley tender comprising in combination a case, a reel rotatably mounted therein, a centrifugal dog pivotally secured to the reel and held in an inward position during rotation of the reel not'to exceed a predetermined speed, but vmovable into an outward position by centrifugal force upon rotation of the reel to exceed said predetermined speed,'a spring connectedto the dog and reel, said spring operating to resist In testimony whereof I aiiiX my si nature.

REX G. AVE ILL. 

